Method of ornamenting glass or porcelain ware.



No. 674,620. Patented Ma 2|,-|9o|.

' H. THUEMLER.

METHOD OFUR'N-AMENTING GLASS 0R PORCELAIN WARE (Application filed Dec.10, 1900.) (No Model.)

WITNESSES I INVENTOR UNITED STATES PATENT FFICEt HUGO THUEMLER, OFPITTSBURG, PENNSYLVANIA.

METHOD OF ORNAMENTING GLASS OR PORCELAIN WARE.

SPECIFICATION forming part of Letters Patent No. 674,620, dated May 21,1901.

Application filed December 10, 1900.

Serial No- 39,26l. (No specimens.)

To all whom, it may concern.-

Be it known that I, HUGO THUEMLER, of the city of Pittsburg, in thecounty of Allegheny and-State of Pennsylvania, have invented a certainnew and useful Improvement in Methods of Ornamenting Glass and PorcelainWare, of which the following is a full, clear, and exact description,reference being had to the accompanying drawing, forming part of thisspecification, which is a side elevation of a tumbler having crackledornamentation.

My invention relates to that class of ornamentation known in the art ascrackling or frosting glass and porcelain ware.

Heretofore in order to produce the crackles in glassware the unfinishedarticle onthe end of the blowpipe used in the manufacture of the articlehas been dipped in water, which has the effect of producing crackles inthe surface of the glass. The article was then subjected to heatsuiiicient to anneal and strengthen the same. Owing to the fact that itis necessarythat only one surface of the glassware can be exposed to theaction of the liquid to chill the same, the process of crackling hasheretofore been confined almost exclusively to blown ware, in which theinner surface of the article on the blowpipe cannot come in contact withthe liquid.

The object of my invention is to provide a method of crackling glasseither/blownpr' pressed, and also porcelain and glass wareof everydescription, and to apply it to either a portion of the surface or tothe entireouter surface of the article; and it consists in applying onesurface of the article when in a heated condition to the surface of amoistened pad, roller, or other device, hymeans of which the moisture isapplied to thesurface of the article, and then annealing the article tostrengthen the same.

I will now describe my invention, so that others skilled in the art mayemploy the same.

The glass article either in its'heated condition in the process ofmanufacture or the finished article reheated to the required temperatureis laid upon a pad of blotting-pa per, asbestos, or any other suitablematerial which has been previously moistened with water or any othersuitable liquid and pressed down on the same or rolled over the samewith suflicient pressure to cause the moisture to be brought in intimatecontact with the outer or exposed surface of the article, and thiscontact is maintained a sufficient length of time to crackle the glassor porcelain without breaking the same.

Instead of pressing the article'against a moistened surface, such as apad, the moistened surface in the form of a roller or a brush may beapplied to or pressed against the article. The degree of heat requiredin the article and the amount of pressure and the length of the periodof contact with the moistened surface must be determined by experience,as it will vary somewhat, according to the thickness of the glass andthe composition of the glass.

I do not desire to limit myself to any particular kind of material to beused in the construction of the pad or other appliance, nor do I desireto limit myself to any one kind of liquid.

After the glass article has been crackled in the manner described it isagain subjected to heat to anneal and strengthen the same.

The advantages of my invention will be apparent to those skilled in theart. It enables pressed ware and porcelain to be crackled as readily asthe blown glassware, and by making the pad of certain shapes and sizesthe crackling may be applied to only a portion of the article. It alsoenables all articles to be crackled with a very small percentage ofbreakage.

What I claim is 1. The process of crackling glass, or porcelain, andlike ware, consisting in applying the surface f the -article'when in aheated condition to a QLQLSEQHQQSflrface.

2. The process of crackling glass, porcelain, and likeware,consistingin,applyingthe same, when in a heated condition, to amoistened surface, and then reheatingvthe crackled article. r WT;

In testimony whereof I have hereunto set my hand.

HUGO THUEMLER. Witnesses:

JAMES W. PRESCOTT, J AMES K. BAKEWELL.

